Ore-concentrator



(No Model.) 2 Sheets-Sheet 1.

F. D. DARRAGH &; P. G. KING. ORE GONGENTRATOR.

' No. 506,035. b Pa 'ented Oct. 3, 1893 Hm I? LEI EZZS: .Q. W H '5 MM am? I 2-Sheets-Sheet 2.. I. D. DARRAGH & F. G. KING. ORB GONGENTRATOR.

Patented Oct. 3 1893..

(No Model.)

.Witnsssss. Invsrftur's.

MLEQ

UNKTED STATES PATENT QEFTCE.

FRED D. DARRAGH AND FRED e. KING, OF DENVER, COLORADO.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 506,035, dated October 3, 1893.

Application filed July 18, 1.892. Serial No. 440,294. (No model.)

ments in Ore-Concentrators, of which the fol lowing is a description, reference being had to the accompanying drawings, which form part of this specification.

.Our improvements relate particularly to ore concentrators operating to carry out the wet process of concentrating ores. The improvements lie particularly in an apparatus for giving a suitable and adj ust'able end-shake to the concentrator tray, and an exhauster for removing the gangue, sand, and tailings, from the concentrates. Besides this our invention consists in the novel features and details of construction, arranged, combined and operated, substantially in the manner hereinafter described, illustrated, and claimed.

In the accompanying drawings, Figures 1 and 2 are side elevation and plan of oneform of our concentrator. Figs. 3 and 4 are views showing the two extreme positions of the end shake apparatus. Figs. 5 and 6 are elevation and plan of the exhauster for carrying ofi the tailings into a horizontal trough and pipe, the details of which are shown in Fig.7; and Figs. 8 and. 9 are details in elevation and plan of our scraper blades and the apparatu for operating them.

In the figures like letters of reference indicate like parts.

The shaker tray B is mounted on friction rollers, as shown, supported on the longitudinals of the bed frame 0. At one end of the tray is located the end-shake apparatus. A rocking lever D fulcrumed at the base of a pair of standards E is pinned to one end of the short toggle link F connected at its other end to a draw-bar G, which reciprocates in guides G cast integralwith the standards E. The head of the draw-bar, secured to the tray B, transmits the reciprocating motion or shake to the tray. Upon the standards E is mounted the crank shaft H of the driving wheel J. The wheel is preferably made heavy to serve as a flywheel for the end-shake. A connecting rod or pitman L connects the cranks H with a sliding box or head L adjustably secured upon the free end of the rocking lever D. Figs. 3 and 4 show the positions of these parts when the cranks are on dead centers, that is to say when the link L is in line with the cranks. At one dead center the toggles (formed by the link F and rock lever D) will be in line, and thetrayBdrawn to one limit of its vibration while at the other dead center the elbow of toggles willbe drawn up and the tray forced to its other limit. It will be noticed that the dead centers are not one half revolution apart and therefore the movement of the tray toward the exhauster and separator may be made much slower than the return movement. The end-shake, has, in fact, a quick return motion causing the pulp within the tray to be slowly advanced, by the vibration, toward the more remote end of the tray. The length of vibration may be varied by adjusting the slide L upon the curved end of the rock-lever D. The curvature of the lever is such that, however adjusted, the toggles will assume substantially the same positions when the cranks are on the dead center as in Fig. 4.

The pulp is made quite fluid, and introduced through the hopper B at the front of the tray. By the agitation it is gradually advanced along the bed of the tray toward the exhauster. The exhauster consists of a stationary pipe M or trough around which are revolved, by any suitable means, a series of curved vanes N carried by circular end-plates N. The form and arrangement of the vanes is clearly seen in Figs. 5 and 6 and is such that as the vanes revolve they carry the surface water and suspended gangue from the tray into the pipe M, the upper half of which is cut away as in Figs. 5 and 7, to form a. receiving trough. Beneath the exhauster we place a'thin horizontal separator or protection plate N which permits the concentrates with some heavier gangue to pass beneath undisturbed by the vanes of the exhauster while the surface gangue is carried upward into the pipe M; whence it flows off into the waste pipes M.

The tray, at the rear end of the exhauster, is provided with an adjustable incline B" above which work our scraper blades 0, carried on transverse rock-shafts O. The shafts O are centered at each end on lugs 10, on a pair of traveling heads P, which slide along the longitudinal bars P pivoted to the ex- IOC hauster p' and adjustableat the other end by means of a screw-standard or screw-post Q. Upon each of the shafts O are short crank arms 0 connected to the horizontal tappet rods R. The traveling heads P are given a reciprocating movement by means of cranks S and connecting rods S pinned to studs on the heads. The crank shaft S receives its motion from the sprocket chain-and wheels T, which connect it directly with the rotary exhauster. As the heads P reach the end of their travel toward the exhauster the tappet rods R strike the tappets R. and rock the scraper shaft and blades upward, allowing them to be carried back on the return motion clear of the pulp in the tray. On reaching the other extreme limit of their travel the tappet rods strike the tappets R which again rock the scraper shafts-and bring the scrapers back to their verticalposition. By the movement of the scrapers the surface water and tailings that have passed the protective separatorplate "N'. are washed back into the exhauster leaving the concentrated ore or metal on the inclined: table or bedB of the tray, over which it progressesand falls from itsraised end into the receiver U. To

facilitate this final washing away of the tailings from the concentrates we provide feedcomplete series of actions to wh-ichthe broken ore and gangue is subjected in its passage through the concentrator. The slide L is adjusted upon the lever D till the desired.

length of stroke is had. The ground oro,.well mixed withwater till perfectly fluid, is then. introduced through the hopper B. As this pulp is agitated and advances toward the; separator plate N, the metallic portions precipitate and the lighter sand and gangue becomes suspended above near thesurface. ;Inthe further progress toward the rearof the tray,: the concentrates with some of theheav-z ier. gangue pass beneath the plateN andare protected thereby from the disturbing action. from the vanes ofthe exhauster. The surface water on the other hand, with the greater portion of the tailings is caught in the trough-J shaped vanes and carried into the waste con-.

duit pipe N. As the concentratesbeginto ascend the inclinedt-ableB" they meet zthe flow. of clearwater from the feedersV, which .isswept in the opposite direction, toward the exhauster by the pulsations of the scrapers,: and carrieswith it the remaining gangue, but permits the concentrated ore to move up the incline and finally to fall into the receiver; U, whence it may be removed from time totime as it accumulates.

In the foregoing passages we have set forth one embodiment of our invention and we therefore, desiring to secure by these Letters Patent the many changes that may be suggested by mere mechanical skill without departure from the general principles of our invention, claim thefollowing:

1. In combination in an end-shake ore concentrator, a driving crank, connecting rod, rocking-lever, draw-bar, and toggle link, for giving motion to the tray of the concentrator, a rotary exhauster provided with curved vanes. for carrying the surface water and tallings to the waste pipes, a separator plate beneath the exhauster, and incline within the said tray, feeders for supplying water to the said incline, reciprocating scrapers traveling above the said incline for throwing the said scrapers into orout ,ofuoperative position for disturbing. the surface water and suspended tailin gs, substantially "13S, .and forl the purposes, set forth.

2. 111 combination for the purposes set forth, a vibrating tray. B, axdrawrbar G connected therewith,ar rockingdever: D and toggle link Ffor the said drawrbar and cranks and a connecting rod pivotally connected with the said rockingllever .rD, substantially as i described.

3. In combination-with a. vibrating tray B, a draw-bar for; actuating the said tray, toggles "for actuatingtthe said draw-bar,wand a quick-return motion'for actuating thesaid toggles, whereby the material within the. tray is given; an intermittent vibratory 1 and progressivemovement, substantiallywas, and; for the purposes,=set:forth.

4:. r In combination, a vibratory tray, B,l.togglesforvibrating the said tray, and anadjustable quick-return motion .for actuating 1 the said toggles, lsubstantiallyaspand for the purposes,- set. forth.

5. In combination for the purposes .described, a crank shaft I-Iland .connectinggrod L therefor, a: rocking-lever D, .a 1' slide .I/u-secured to the said rockingrleverand pinned to the said connecting rod,"ailinki-Fvconnected at one end with a draw? bar G. .or other reciprocating part and pinnedzat.itscothenend to the rocking lever D. and l forming .therewith toggles for reciprocating the-said .dra-w bar or other part, substantially laseset forth.

6. In combination, a trough .orconduitfM, and a series of .trough-shaped vanes'N and supporting enddisksN; revolving around the said conduit, the outer edges of thesaid vanes being: free to pass under andrscoop up the tailings or other material to bewremoved,-rsubstantiallyv-as, and for the: purposes sett forth.

7. 1 In 'combinationwith .astationary trough or conduit M,one or more trough-shaped vanes orscoops N mounted: to revolve about the said conduit, the outer edges of; the saidvanes being. free to pass under and scoopup'the tailings or other material toberemoved substantially. as, and: for the; purposes, set forth.

8. In combination with the tray of an ore concentrator, a separator plate NV placed transversely to the said tray a nd an exhauster placed above the said plate and consisting of a trough or conduit and vanes revolving around the said conduit, substantially as, and for the purposes, set forth.

9. In combination with a vibrating tray of an ore concentrator, a separator plate N placed above the bed of the tray at a position approximately between the heavier concentrates and the tailings and surface water, and rotary trough shaped vanes for removing the surface Water and tailings from above the said platesubstantially as, and for the purposes, set forth.

10. In combination with the tray of an ore concentrator, an exhauster for removing the surface Water and tailings therefrom, and one or more traveling scrapers for carrying the surface water toward the exhauster, substantially as, and for the purposes, set forth.

11. In combination in an ore concentrator, for the purposes set forth, one or more scrapers O, reciprocating supports, one or more rock-shafts carrying the said scrapers, and means for rocking the said shafts and thereby removing the scrapers from operative pos'itions when the said supports are traveling in one direction and forrestoring-the scrapers to operative position when traveling in the opposite direction, substantially as described.

12. In combination with one or more guides P, one or more traveling heads P, one or more scraper blades 0 and supporting shafts O, and one or more tappets for rocking the said blades into and out of operative, position, substantially, as, and for the purposes, set forth.

13. In combination with one or more guides P, one or more traveling heads P, one or more scraper bladesO and supporting shafts 0, one or more tappet bars carried by the said shafts, one or more tappets therefor, and one or more cranks and connecting rods for actuating the said traveling heads, substantially as, and for the purposes, set forth.

In testimony whereof we hereto put our hands this 25th day of June, 1892.

F. n. DARRAGH. FRED e. KING.

Witnesses as to the signature of F. D.Darragh:

W. H. GROSE, K. T. DEARING. Witnesses as to the signature of Fred G.

King:

HENRY WALKER, E. RHMARCH. 

